Adjustable stationary blade for hair clippers



June 7, 1932. 1.. u. WAHL ADJUSTABLE STATIONARY BLADE FOR HAIR CLIPPERSFiled May 9. 1950 2 Sheets-Sheet 1 June 7, 1932. w 1,861,616

ADJUSTABLE STATIONARY BLADE FOR HAIR CLIPPERS Filed May 9. 1930 2Sheets-Sheet 2 Patented June 7, 1932 UNITED STATES PATEN LEO J. WAHL, FSTERLING, ILLINOIS, ASSIGNOR T0 WAHL CLIPPER STERLING, ILLINOIS, ACORPORATION OF ILLINOIS CORPORATION, OF

ADJUSTABLE STATIONARY BLADE FOR HAIR GLIPIERS Application filed May 9,

My invention relates to hair clippers and more particularly toadjustable stationary blade construction for hair Clippers.

It is the principal purpose of this invention to provide a stationaryblade for hair clippers which can replace the standard stationary bladeand which is adjustable lengthwise to vary the extent which it projectsbeond the forward edge of the movable blade. It is also a purpose ofthis invention to provide in a device of this character a novel meanswhereby to prevent chattering or rattling of the stationary blade due tothe vibra tion of the movable blade.

Other and more specific objects of the invention will appear as thedescription proceeds in connection with the accompanying drawingswherein the preferred form of the 0 invention is shown. It is obvious,of course, that various modifications may be made without departing fromthe scope of the invention and the disclosure is not to be taken aslimiting the invention except in so far as it is limited by the claims.

In the drawings 7 1 is a side view of a clipper in which the stationaryblade has been replaced with my improved device;

Fig. 2 is a fragmentary section taken centrally through the clipper atthe forward end:

Fig. 3 is a section on the line 33 of Fig. 2: Fig. 4 is a rear end viewof the blade: Fig. 5 is a section on the line 55 of Fig. 3; Fig. 6 is aperspective view of the member which supports the adjustable blade;

Fig. 7 is a side view of the front portion of the clipper showing aslightly modified form: Fig. 8 is a longitudinal section through themodified form:

Fig. 9 is a section on the line 99 of Fig. 8;

10 is a rear end view of Fig. 9; and

Fig. 11 is a section on the line 1111 of Fig. 9.

Referring now in detail to the drawings, I

show at 10 an ordinary clipper housing which is of a well knownelectro-magnetic type such for instance as that shown in my priorapplication Serial No. 392.866. filed September 16, 1929, now Patent No.1,774,046, this ap- 1930. Serial No. 450,978.

plication being an improvement upon a structure disclosed in the priorapplication.

In clippers of this character, movable blade 11 is driven by a vibratoryarmature 12 so as to move back and forth across the stationary blade 13.'In the present instance this stationary blade is so mounted as to bereadily adjustable so as to vary the distance itextends beyond the frontof the movable blade. To accomplish this adjustment, a mounting member14 in the form of a base plate is provided with shoulders at 15and 16which shoulders are apertured as indicated at 17 and 18 so as to beattached by the usual holding screws 19 and 20. It is to be noted thatthe apertures provided at 17 and 18 are somewhat larger than the screwsso that before clamping the member 14 in position tightly,

it may be adjusted properly to align itself' with the movable blade andthus'properly p0- sition the stationary blade 13. This struc- 'ture,however, is shownfand claimed in my groove 23 to receive the rearwardlyextending shank 24 on the stationary blade. The stationary blade isprovided onits under surface as indicated at 25 with agroove extendingstraight back at right angles to thefront edge thereon, this groovebeing provided to receive the bearing wedge 26 formed on the surface 21of the base plate 14. Similarly a cooperating groove 27 and a V-shapedprojection 28 are provided where the shank 24 projects into the groove23. This provides inclined bearing surfaces between the stationary bladeand the base plate 14 so as to maintain them in proper alignment at allwhich the movable blade operates setting up vibrations therein. Thestationary blade is held down on its bearings solely by the pres sure ofthe movable blade thereon in the form shown in Figs. 1 to 6 which isfound to be sufiicient in this form to prevent any rattling of thestationary blade and to maintain a firm contact between the inclinedbearing surfaces formed bythe wedges 26 and 28 and the correspondinggrooves.

As a means of operating a stationary blade to move it forward andbackward. Iprovide the hand lever 29 which as shown is pivoted at 30 tothe under side of the stationary blade and bears at 31 against the frontof the shoulder 16, and at 32 this lever is adapted to bear against theback wall 33 of the surface 21. Owing to the wedge shaped form of thelever 29' and its rounded corners at 31 and 32, it is found to beunnecessary to allow for any great amount of play between the lever andthe shoulder 16 on the one side and wall 33 on the other side as thewedge shaped form of the lever is sufficient to give clearness theretofor the desired rangeof movement of the'adjustableblade.

Referring now to Figs. 7 to 11 inclusive, in 7 this form the base plate14 is recessed at 22' in the same manner as before and is provided withshoulders'l5 and 16' as in the preferred form and in this case thestationary blade 13 and forward bearing surfaceQl are provided with thecooperating groove and wedge shaped bearing surfaces 25 and 26 as in themain form. The rear mounting of the stationary blade 13", however, issomewhat different. In this form, shank 24 is bevelled as shown at 34and 35, and the shoulders 15 and 16 are correspondingly bevelled so asto receive the shank 24. The pressure of the movable blade will hold thestationary blade down upon the bearing at 26', but at the rear of thestationary blade the shank 24 is pressed upwardly in opposite directionby bowing the lever 29' upward slightly so as to cause it to exert ayielding pressure upwardly against the lower surface of the stationaryblade. In this fashion, the inclined bearing surfaces at 34 and 35 andat 25 and 26 always maintain in close fitting engagement with some smallpressure thereon which'prevents rattling of the stationary blade due tovibration. The free end of lever 29 may, of course, be turned up asindicated at 36 so as to make it convenient for operation by the user ofthe clipper.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is: s

1. In a clipper, a stationary blade, a movable blade, mounting means onwhich said stationary blade is movable to vary its projection beyond thepoint of the movable blade, inclined bearing surfaces guiding said bladein its movement, and means yieldingly pressing said bearing surfacestogether whereby to prevent vibrations of said stationary blade, and alever pivoted on the surface of said stationary blade opposite themovable blade contacting surface for adjusting the same.

2. In a clipper, a stationary blade, a movable blade, mounting means onwhich said stationary blade is movable to-vary its projection beyond thepoint of the movable blade, inclined bearing surfaces guiding said bladein its movement, and means yieldingly pressing said bearing surfacestogether whereby to prevent vibrations of said stationary blade, and. alever pivoted on the surface of said stationary blade opposite themovable blade contacting surface for adjusting the same, said leverhaving at the outer end thereof an upward projection extending alongsidethe casing to serve as an operating handle.

3. In a clipper, astationary blade, a movable blade, mounting means onwhich said. stationary blade is movable to vary its projection beyondthe point of'the movable blade,

inclined bearing-surfaces guiding said blade in its movement, and meansyieldingly pressing said bearing surfaces'togetl'ier whereby to preventvibrations of said stationary blade, and a lever pivoted on the surfaceof said stationary blade opposite the movable blade contacting surfacefor adjusting the same, said mounting meanslbeing provided with fulcrumportions for engagement by said lever. a

4. In a clipper, a stationary blade, a movable blade, mounting means onwhich said stationary blade is movable to vary its projection beyond thepoint of the movable blade, inclined bearing surfaces guiding said bladein its movement, and means yieldingly pressing said bearing surfacestogether whereby to prevent vibrations of said stationary blade, and alever pivoted on the surface of' said stationary blade opposite themovable blade contacting surface for adj usting the same, said mountingmeans being provided with fulcrum portions for engagement by said lever,and said lever and portions having means to limit the movement of saidadjustable blade.

5. In a clipper, a stationary blade, a movable blade, mounting means onwhich said stationary blade is movable to vary its projection beyond thepoint of the movable blade, said mounting means comprising a base platehaving shoulders engaging the clipper casing to space the plate from thecasing, the stationary blade being mounted between the easing and saidplate, a lever pivoted between said blade and plate for advancing orretracting said blade, said plate having a transversely runningprojection receiving said lever.

6. In a clipper, a stationary blade, a movable blade, mounting means onwhich said stationary blade is movable to vary its projection beyond thepoint of the movable blade, said mounting meanscomprising a base platehaving shoulders engaging the clipper casing to space the plate from thecasing, the stationary blade being mounted between the casing and saidplate, a plurality of V-shaped ribs on the blade engaging face of saidplate, and grooves in the blade receiving said ribs.

7 In a clipper, a stationary blade, a movable blade, mounting means onwhich said stationary blade is movable to vary its proj ection beyondthe point of the movable blade, said mounting means comprising a baseplate having shoulders engaging the clipper casing to space the platefrom the casing, the stationary blade being mounted between the casingand said plate, a plurality of spaced tapering projections on the bladeengaging face of said plate-and V-shaped grooves in the blade to receivesaid projections.

8. In a clipper, a stationary blade, at movable blade, mounting means onwhich said stationary blade is movable to vary its projection beyond thepoint of the movable blade, said mounting means comprising a base platehaving shoulders engaging the clipper casing to space the plate from thecasing, the stationary blade being mounted between the casing and saidplate, aplurality of spaced tapering projections on the blade engagingface of said plate and V-shaped grooves in the blade to receive saidprojections. said grooves being spaced from each other in the directionof adjustment of said'stationary blade.

9. In a clipper, a casing having a stationary blade and a movable bladethereon, mounting means on which said stationary blade is movable tovary the amount of its projection beyond the forward end of the movableblade, and means for moving the stationary blade comprising a leverpivotally secured to the stationary blade on the surface opposite themovable blade, and means fixed relative to the casing cooperating withsaid lever, said lever having a finger piece projecting upwardly at theside edge of said stationary blade.

10. In a clipper, a casing having a stationary blade and a movable bladethereon, mounting means on which said stationary blade is movable tovary the amount of its projection beyond the forward end of the movableblade, and means for moving the stationary blade comprising a leverpivotally secured to the stationary blade on the surface opposite themovable blade, and means fixed relative to the casing cooperating withsaid lever, said lever having a finger piece projecting upwardly at theside edge of said stationary blade, said lever being reversible end forend on said stationary blade to bring said finger piece adjacent eitherside edge of the stationary blade.

In witness whereof I hereunto subscribe my name this 21st day of April,A. D. 1930.

LEO J. WAHL.

